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EMBROIDBRING MACHINE.

No. 521,197. Patented June 12, 1894.

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EMBROIDERING MACHINE.

No. 521,197. Patented June 12, 1894.

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(No Model.) 8 Sheets-Sheet 8. R WEISS EMBROIDERING MACHINE.

} Patented June 12, 1894.

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RUDOLPH WEISS, OF NOTTINGHAM, ENGLAND.

EMBROlDERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 521,197, dated June 12, 1894. Application filed February 20, 1891. Serial No. 382,214. (No model.) Patented in England May 6, 1890, No. 7,031; in France February 9, 1891, No. 211,275; in Switzerland February 10,

1891, No.3,477; in Belgium February 11, 189L110. 93,726, and

in Austria-Hungary July 21, 1891, No. 10,029 and No. 25,753-

To all whom it may concern.-

Be it known that I, RUDOLPH WEISS, asubject of the Queen of England, residing at Nottin gham, England, have invented certain new and useful Improvements in or Relating to Embroidery-Machines, of which the following is a specification, the same having been patented to me in France, No. 211,275, February 9, 1891; in Belginm, No. 93,726, February 11, 1891; in Switzerland, No. 3,477, February 10, 1891; in Austria-Hungary, No. 10,029 and No. 25,753, July 21, 1891, and in England, No. 7,031, May 6, 1890.

This invention relates to embroidery machines in which the material to be embroidered is carried on a framing which is moved by a pantograph operated by an attendant or other means and in which series of double pointed needles are employed provided with threads of a limited length which are alternately passed entirely through the fabric and received by series of jaws or nippers arranged on each side of the fabric. It will be best understood by reference to the accompanying drawings, in which Figure 1 is a front elevation of the left hand end of the machine. Fig. 2 is an end elevation partly in section. Fig. 3 is a cross section of part of the upper tier of the needle operating mechanism and the tissue or material being embroidered. Fig. 4is a front view of part ofone of the take-up bars. Figs. 5 and 6 are an elevation and a plan respectively showing modification of a take-up bar. Figs. 7 and 8 are an end and a side elevation respectively of a take-up cam. Figs. 9 and 10 are an end and a side elevation respectively of a nipper-carrying-bar-cam. Figs. 11 and 12 are an elevation and a plan respectively showing detail of take-up regulating devices. Fig. 13 is a side elevation showing detail of the take-up mechanism. Figs. 14 and 15 are an end and side elevation respectively of the nipper-carrying bar counter cam. Figs. 16 and 17 are an end and side elevation respectively of the nipper-releasing shaft cam. Figs. 18 and 19 are a side and front elevation respectively of the driving mechanism at the right hand end ofthe machine, and Figs. 20 and 21 are an end and side elevation respectively of one of the support bar-cams.

The machine as described is adapted tooperate an upperand lower tier of needles which tiers are in part identical with each other.

I The upper tier is also operated simultaneously with its corresponding lower tier and by the same cams, it will also be understood that the back of the machine is mainly a copy of the front and that the following which is a description of the front applies also substantially to the back where not otherwise stated. The framing of the machine consists essentially of two end standards A and intermediate standards B connected by tie-bars O at the top and by rails D at the front and back also outside the end standards A are reduced standards E connected to the end standards by suitable cross stays.

The Dipper-carrying bars F are supported by hangersG those of the uppertier being pivoted at G in brackets G2 secured to the tie-bars C and those of the lower tier at G to the hangers G of the upper tier the said hangers being thus free to move or swing to or from the material or tissue H hereinafter called the tissue.

Motion is imparted to the nipper-carryingbars F by links F connected to levers F secured on rocking shafts F carried in bearings I secured to the framing; motion is imparted to the rocking shaft F by means of cams F and F secured on the cam shaft J which is carried in bearings J secured to the framing. The cams F and F are in peripheral contact with antifriction rollers pivoted on lever F and arm F secured to a shaft F journaled in bearings carried preferably by the rail D the lever F is connected by links F andF to arms F secured to the rocking shafts F by this means a positive motion is obtained both for the in and out movement of the bars F the cam F being cutso as to act as a counter-cam to the cam F shafts K carried in bearings K secured to the hangers G which shafts are turned through a cured thereto connected by preferably slotted The needle nippers may be operated so as V to release the needles by means of eccentric sufficient space to depress the tails of the nip-,; 1 pers when required by means of arms K so links K to arms K secured to rocking shafts K carried in the bearings I. lldotion is imparted to the rocking shafts K by a cam K (Figs. 16 and 17) secured on the cam shaft J operating a lever K which is pivoted at K to a bracket K secured to the rail D and at its free end is connected by links K and K to the rocking shafts K The take-up bars L of special construction hereinafter described are carried by arms L secured in the case of the lower tier on a rocking shaft L carried in bearings L secu red to the framing and in the case of the upper tier may be pivoted on independent pivots L secured to the framing the arms L of the upper and lower tiers being connected by links L and are thus operated simultaneously by the rocking shaft L both upper and lower sets of arms L may however be carried on rocking shafts or on independent pivots and in the latter case actuated by a rocking shaft arranged at any convenient part of the machine through any suitable mechanical arrangement. The rocking shaft L is actuated by a cam L secured on the cam shaft J operating through an antifriction roller a supplementary lever L provided with a projection L which ongages with and operates the lever L. This lever is pivoted at L to a bracket L secured to the framing and is connected at its free end by a link L to an arm L secured on the shaft L The take-up bars L may be counterbalanced by means of weights L adjustable on arms L secured on the shaft L if desirable such weights may be moved or adjusted by the attendant working the pantograph, by this means the tension put on the threads by the take-up bar L may be regulated to suit different kinds of stitches or tissue.

The support bars M are arranged with their upper edges immediately below the needles and the threads drawn over them by the takeup so that the said threads are drawn at right angles, or nearly so, through the tissue, for this purpose also they are withdrawn from the tissue each stitch a sufficient distance. They are carried by brackets M which pass over the nipper-carrying-bars F and are secured to a bar M actuated by links M connected to arms M secured on the rocking shaft M carried in the bearings I. The rocking shafts M are operated by a cam M (Figs. 20 and 21) secured on the cam shaft J actuating through an antifriction roller a lever M pivoted at M to a bracket M secured to the rail D and connected at its free end by links M and M to the levers M secured to the'shafts M The parts M and M" are immediately behind the corresponding parts K and K in Fig. 2.

In embroidery machines of this description where the needles are always withdrawn the same distance from the tissue, it is necessary to provide a take-up for drawing the threads through the tissue.

In my improved arrangement the take-up bar L of which there are two to each tier of needles are arranged so that the stitches can be made from that side of the tissue where the take-up bars are in their lower position and the needles pass through to the side where the take-up bars are in their highest position; as the take-up bars on the side to which the needles have passed descend to draw the threads N through the tissue the bars on the other side are raised thus keeping the threads N always in tension or nearly so which prevents them from kinking. \Vith this movement the take-u p bars must be constructed so as to release the threads when they approach their upper position. To ei'ifect this the bars L may be constructed in the following manner (see Figs. 3 and 4): On the take-u p bars and corresponding to the number and position of the needles are secured brackets I extending upward, each bracket is provided at its upper end with a sliding pin or bolt P adapted to slide out of and engage in a corresponding recess in the one next to it thus closing the space between the brackets. The bolts P may be operated as shown by levers I pivoted at P on the brackets P the upper ends of which engage in annular recesses P in the pins P and provided at their lower ends with pins or projections P which engage with a bar P which is shogged against the action of a spring. The needles pass through the tissue and through the space between the brackets P below the level of the bolts 1" which thus retain the threads N as the bar descends, as the take-up bars on the other side of the tissue approach their upper position the bolts P may be withdrawn to release the threads by shogging the bar P and again closed so that a stitch can be immediately made from the other side. \Vith this arrangement the movement of the take-up bars is reduced to the simplest form and immediately the bars on one side reach their lower position and the bars on the other side of the tissue their upper position a fresh stitch can be made. The bars P are preferably formed of thin steel known as steel bar and may be connected by one of their ends to a spring secured to its corresponding take-up bar L and the remaining ends (see Fig. 13) after passing over a pulley P pivoted to the opposite end of the bar to which the spring is socured, and a pulley P pivoted to a bracket I secured to the framing, are secured to the free end of the lever P actuated by a cam P secured to the cam shaft J. The releasing movement is thus independent of the take-up movement and the threads can be released when the take-up bars are in any position or when they are at rest.

In a modification shown in Figs. 5 and (i a take-up bar L may be formed as shown with openings 0 corresponding to the position of the needles, sliding on the bar L is a bar 0 provided with upward extensions at the upper ends of which are extensions or bolts 0 which are of sufficient length to close the reduced width of the opening 0 at the top when shogged on the bar L, the bar 0 may be retained in position by screws 0 passing through slots in its lower part and at the upper part by cars 0 on the barLturned down over the bar 0'. The bar 0' may be shogged by a steel bar or other flexible connection in the same manner as hereinbefore described against the action of a spring.

I do not however confine myself to the precise arrangement of take-up bars set forth as it is obvious that numerous other arrangements may be employed for retaining and releasing the threads.

The surfaces of the take-up cams L (see Figs. 7, 8 and 12) are formed of a considerable length and cut with a gradually reducing motion toward one end so that as the length of thread in the needles is reduced the cam by changing its position with respect to the antifrictionroller in peripheral contact therewith will produce a corresponding decrease in the motion or stroke-of the take-up bars. To effect this automatically the antifriction roller of each cam is pivoted on the supplementary lever L (see Figs. 1, 2, 11 and 12) which is pivoted'on the connecting pin L of the lever L and link L The lever L is provided with the projection L which engages with and depresses the main lever L thus raising the take-up bars. As the threads in the needles decrease in length as they are worked into the tissue they will stop the takeup bars before they reach their lowest position with respect to the relative positions of the cam and antifriction roller and the main lever will consequently stop but the supplementary lever L by reason of the action of the spring L will follow the cam and its free end L will consequently rise turning about its pivot L The free end L of the lever L engages with the lower forked end of a link R connected at its upper end to a lever B secured on the shaft R carried in bearings R secured to the framing, the inner end of the lever B is provided with a pawl R which engages with the ratchet wheel R as the inner end of the lever B is raised against the action of the counterweight B through the link B by the lever L its outer end and pawl R will descend and is again raised by a cam R secured to the cam shaft J acting on the antifriction roller pivoted on the lever B which is secured on the shaft R thus turning the ratchet wheel B through a space corresponding to the distance the inner end of the lever B is raised and returning the latter together with the lever L to their normal positions. The ratchet wheel R is secured on a shaft S carried in bearings S secured to the framing and is connected at its inner end by spur wheels S to a shaft S carried in the bearings S and S The shaft S is provided with a Worm S which engages with the annular rack S on the cam shaft J which is thus moved longitudinally by turning the ratchet wheel R By this means the relative positions of the cam L and antifrictionroller in peripheral contact therewith will be automatically changed and the motion of the take-up bars will be constantly reduced so as to correspond to the constantly reducing length of thread in the needles and such reduction of the motion of the take-up bars will be governed by the threads as their length is reduced. As the length of the threads in the needles decreases less motion or strokes of the take-up bars is required and consequently a less number of the three hundred and sixty degrees of each revolution of the cam are wanted for that movement, the degrees thus not required by reason of the reduction of the motion of the take-up bars not wholly going to increase the number of the degrees of rest but atdifferent positions in the length of the cam being distributed between the moVement-giving degrees and the degrees of rest the speed of the cam shaft may beincreased without increasing the speed of the take-up bars or altering the length of the period during which they are at rest.

By speed of the take up bars is meant the number of movements per minute, as it is obvious that if the speed of the cam shaft is increased it will increase the number of strokes per minute. Advantage is taken of the fact that at each succeeding stitch the length of movement of the take up bars is decreased and in proportion to the decrease of the length of movement of the take up bars, the number of strokes per minute are increased and consequently more stitches are made per minute as the needle threads become shorter. By the employment of a cam, however, such as described, in which the movement giving degrees and the degree of rest are redistributed in diiferent parts of its length, although the speed of' the cam shaft is increased, as the take up bars move through a shorter are or path, less time is required for each movement and therefore the actual velocity or speed at which the take up bars travel along the path is not accelerated. For example. If the machine starts with a forty inch length of thread in each needle, fifteen stitches per minute may be made as the take-up bars travel along a path twenty inches long. When the threads are reduced to twenty inches the take-up bars will only travel along a path ten inches long and will consequently travel much slower or the period of rest will be increased, only half the time being now required for the take-up, this time may therefore be saved by the arrangement described and a consequent increase is obtained in the amount of work the machine will produce. As it is not desirable to decrease the length of the period of rest between each movement, the cam is graduated in this respect so to counteract the increased speed of the cam-shaft, the remaining cams are also graduated so that their movement giving degrees are increased so as to counteract the increased speed of the cam-shaft, while their degrees of rest are correspond ingly decreased. When the period of rest on the take up cam is in operation, the movement giving degrees of the remaining cams will be in operation and consequently the period of rest of the take-up bars and period in which the remaining parts are in action will coincide and the length of time for each will remain constant throughout. Themovement giving degrees of the take-up cam will in like manner coincide with the degrees of rest on the remaining cams and the decrease in the time occupied by the movement of the former will coincide with the decrease of the periods of rest on the latter.

To increase the speed of the cam shaft the driving belt T may run on coned pulleys T Figs. 18 and 19 the upper one of which is secured on a shaft T carried in bearings T secured to the framing and provided with fast and loose pulleys T the lower pulley T is secured on a shaft T carried in bearings T secured to the framing and is connected to the front cam shaft J by spur wheels T and T The belt T is moved on the pulleys T by a fork or flanged pulley T rotating on the cam shaft J which by its lateral movement decreases the motion of the take-up bars and by moving the belt T increases the speed of the cam shaft to an amount which is regulated by the shape of the pulleys T.

As it is not desirable to increase the speed of any of the working parts of the machine as the duration of the length of rest of the take-up bars is uniform it will be necessary to compensate for the increased speed of the cam shaft. This I am enabled to do by employing cams of a length equal to the take-u p cams and receiving the same longitudinal movement as the take-up cam and cam shaft J, these may he graduated toward one end (as shown in Figs. 9, 1O, 14, 15, 16, 17, 20 and 21) so that although imparting the same motion throughout to the cam levers working in connection therewith the number of the degrees of motion are increased to correspond to the increased number of the degrees of rest on the take-up cam and the number of degrees of rest are correspondingly decreased to correspond to the decreased movement of the take-up bars.

To prevent the cam levers from being strained by the longitudinal motion of the cam shaft and the inclined surfaces of the cams their free ends may be adapted so as to work in vertical guides of suitable construction preferably secured to the framing.

The spur wheel T is provided with a feather engaging with a longitudinal groove or keyway T in the cam shaft J which is thus free to slide longitudinally through the wheel T which is held in position by the bearing T secured to the cross stay T secured to the spur wheel T is a motive wheel U in gear with a corresponding wheel U secured to the cross shaft U carried in bearing U secured to the framing, this shaft. communicates motion to the back cam shaft by means of another pair of miter wheels and a similar arrangement as shown in connection with the front shaft.

It is obvious that if the cam shaft was run at the same speed throughout it would not be necessary to employ graduated cams except in connection with the take-up which cam could be adapted to slide laterally on the cam shaft the remaining cams being of ordinary construction.

I wish it understood thatI do not bind myself to the precise construction of apparatus herein described and shown in the accompanyin g drawings as many parts may be modified without departing from the spirit of the invention.

I claim- 1. In an embroidery machine, the combination with the thread carrying needles and operating mechanism, of the movable take up bar L carrying movable bolts for holding and releasing the threads; substantially as described.

2. In an embroidery machine, the combination with the thread carrying needles and operating mechanism, of the movable take up bar L carrying a series of" bolts for holding the threads connected for simultaneous movement, with means for operating said bolts; substantially as described.

3. In an embroidery machine, the combination with the thread carrying needles, and operating mechanism, of the movable take up bar having recesses or openings therein for the passage of the needles and the members moving across said recesses or openings to hold the threads therein; substantially as described.

4. In an embroidery machine, the combination with the thread carrying needles and operating mechanism, of the bar L, brackets l, sliding bolts P levers P and bar P forming a take up bar; substantially as described.

5. In an embroidery machine, the combination with the thread carrying needles and operating mechanism of the take up bar, the movable bolts on said bar for holding the threads, the flexible connection P for moving the bolts, pulley P lever P and cam P; substantially as described.

6. In an embroidery machine, the combination with the thread needles, operating mechanism therefor, movable take up bar and its movement transmitting connections, of an actuating cam L cooperating with said take up bar movement transmitting connections, said cam imparting the complete back and forth movements to the take up bar between successive stitches, and having its cam surface graduated at right angles to its plane of rotation, with automatic means for shifting the relative positions of the cam and take up bar movement transmitting connections, longitudinally of the axis of the cam, whereby the length of the back and forth movement imparted to said bar as produced by said cam, is varied to compensate for the varying length of the thread; substantially as described.

IIC

' the cam and lever L 7. In an embroidery machine, the combination w1th the thread needles, operating mechanlsm therefor, a take up, a lever L for opcrating said take up and an operating cam having lts cam surface graduated at right angles to its plane of rotation, of the lever L moved by the cam and cooperating with the lever L to move the same and mechanism operated by the lever L for shifting the relatlve position of thecam and lever L whereby the length of the movement of the cut-0E may be varied; substantially as described.

8. In an embroidery machine, the combination with the thread needles, operating mechanism cam, take up, and lever L of the lever L lever R connected therewith, the ratchet wheel R for shifting the relative positions of and the pawl R moved by the lever B and engaging said wheel; substantially as described.

9. In a take up bar operating mechanism, the combination with the take up bar,its operatlng lever and cam cooperating therewith movable with relation to each other, of the ratchet. wheel R and worm connected therewith for changing the relation of the cam and lever, the lever L link R, lever B carrying pawl R shaft R arm R and cam R for operatlng said arm; substantially as described.

10. In a take up bar operating mechanism, the combination with the take-up bar its operating lever and the movable cam cooperating therewith, of the ratchet wheel R shafts S and S connected by worm gear and rack and a pawl and operating lever therefor for moving said ratchet wheel controlled by the take up bar operating lever; substantially as described.

11. In an embroidery machine, the combination with the needle nippers and the bar F on which they are mounted, of the pendent pivoted hangers G carrying the bar F at their lower ends; substantially as described.

12. In an embroidery machine, the combination with the nippers, take up bars, their operating cam having a variable movement and the nipper-carrying bar F, of a cam F for operating the nipper carrying bar, which cam s graduated, the number of movement giving degrees being increased in different parts of its length to compensate for the increased speed of the take-up bar operating cam as the length of the movement of the take-up bars decreases; substantially as described.

. and nipper releasing shaft K, of a cam K for operating the said shaft K which cam is graduated the number of movement giving degrees being increased in different parts of its length so as to compensate for an increased speed of the cam as the length of movement of the take up bars is increased substantially as described and illustrated in the accompanying drawings.

15. In an embroidery machine,the combination with the needles, take up bars and support bar, of an operating mechanism for said support bar M consisting of rocking shaft M arm M link M bar M brackets M and means for operating rocking shaft M substantially as described and illustrated in the accompanying drawings.

16. In an embroidery machine, the combination, with the needles, take up bars having a variable movement, and support M, of a cam M for operating the said bar M graduated, the number of movement giving degrees being increased in different parts of its length so as to compensate for an increased speed of the cam as the length of movement of the take-up bars is decreased substantially as described and illustrated in the accompanying drawings.

17. Inan embroidery machine, the combination with the needles, and take-up bars having a variable movement, of a power transmitting mechanism for increasing the speed of the machine as the movement of the take up bars decreases, consisting of cone pulleys T shafts 'I and T pulleys T and actuating belt substantially as described and illustrated in the accompanying drawings.

In testimony whereof I have hereto set my hand in the presence of the two subscribing Witnesses.

RUDOLPH WEISS.

Witnesses:

F. C. SHELDON, JOSEPH PLAYER. 

